Clooney said he hopes to draw more attention to the issue and is impressedwith President Obama's personal engagement on it. The actor also said that ifaction is not taken in the next three to four months "we're going to have a realhumanitarian disaster."

Clooney was joined by his father, Nick, and Democratic U.S. Rep. Jim Moran ofVirginia, among others, as he walked to the protest site. The group held a signthat read: "Sudan: Stop Weapons of Mass Starvation."